Chimney.



PATENTED SEPT, 10; 1907.

CHIMNEY. APPLICATION FILED JUNE 2 1906.

Y J. T. FLYNN.

PATENT OFFICE.

JOHN T. FLYNN, OF SAN FRANCISCO, CALIFORNIA.

CHIMNEY.

Specification of Letters Patent.

Patented Sept. 10, 1907.

Application filed June 2, 1906. Serial No- 319,879.

To all whom it may concern:

Be it known that I, JOHN T. FLYNN, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented certain new and useful Improvements inChimneys, of which the following is a specification, reference being hadtherein to the accompanying drawing, in which Figure 1 is a verticaltransverse section of a chimney embodying my invention, shown in theform preferred for use in dwellings, olfice or other buildings; Fig. 2,a plan view of the same; Fig. 3, a perspective view of an integral partor section of a chimney such as illustrated in the preceding views; andFig. 4, a fragmentary vertical section of a modification which isespecially adapted for situations requiring high chimneys, as infactories or the like.

The object of this invention is the improvement in chimneys to meet therequirements of modern conditions involving safety, and economy both inthe construction and in the consumption of fuel; and, more particularly,to provide chimney capable of withstanding the effects of wind stormsand seismal disturbances, notably, such as has recently occurred in asection of the country where nearly all of the chimneys were either castdown or so disrupted as to render them unfit for further service.'

A further object of the invention is the provision of a chimney which iscapable of being manufactured in sections or units to standard, orspecial, dimensions at one place and erected by simply assembling suchparts at other places.

A still further object is to provide means to utilize a portion of theheat from the combustion gases to create a thorough ventilationthroughout the building employing my improvements.

The invention consists in the novel construction and combination ofparts as will be hereinafter described and claimed.

In said drawings, the reference numeral 5 designates the inner tubularshell and G the outer tubular shell of a chimney, each formed of sheetor cast metal and disposed concentrically to provide a space 7 for anair-jacket therebetween. These tubes may be, in horizontal sections, ofany suitable shape, as circular in Fig. 4, or quadrangular asillustrated in the other views. For domestic purposes the latterconstruction is usually the most desirable as being more readily builtinto or against the walls of a building, while the circularconfiguration is preferable for tall chimneys of factories, or the like,through the economical use of material as well as presenting lessresistance to the overturning force of high winds.

The inner and outer tubes of the chimney are each made of a plurality ofsections, as in Fig. 3, which are severally provided with means tointerfit with the other similar sections and comprised, desirably, of

angle-bars 8 extending from within a short distance below the top edgeof a section to some distance below the bottom edge thereof, thuspresenting the protruding bar ends 8 for insertion within the nextsection below. These angle-bars also afford means, in the quadrangulartype of tubes, for connecting the component side plates of each sectionand are fixedly secured to the adjacent edges of same by rivets or bolts9, while in the said protruding ends are apertures 10 adapted toregister with apertures 10 provided in the adjoining sections for thereception of securing bolts or their equivalent. Instead of employingprotruding bars, as above explained, for making the connection betweentwo tube sections, and especially with circular and high chimneys, orstacks, T or other suitable bars 11 may be employed; or a marginal hoop12, see Fig. 4, may be substituted in the inner shell to provide ahub-socket 13 for the end of the next section, thus forming an overlapthereat to prevent the escape of sparks or the passage of air throughthe seams even when the chimney should be considerably deflected, as bya gale of wind,

Provision is made, however, to allow of a certain amount of lateraldeflection or swaying of the external shell without affecting the innerone by the use of springs 23 secured, as by rivets 23, to one of theshells and resiliently bearing against the other shell, and tending tomaintain the two shells in their proper relative positions under normalcircumstances. The same function is accomplished, though in a rigidmanner, at the unexposed lower portion of a high chimney and throughoutin the ordinary d0- mestic type, see Figs. 1 and 2, by bolts 24extending through the plates of both shells and also throughintermediately disposed distance pieces or pipes 24/ and are secured byriveting or otherwise.

The inner shell would, where required, be provided with side outletsopening into conduits 14 extended through the outer shell and house wallor partition 15 of the various rooms to receive stove pipes, as 16.About each said conduit is a larger pipe 17 making communicativeconnection between the room and the space 7 between the chimney shellsto provide a vent passage to convey away the contaminated atmosphere,and is regulated by means of a rotatable annular shaped plate 18provided with perforations 18 adapted to register with correspondingperforations 25 of a fixed plate 25 connected to the pipe 17, 01' to thewall. Where a number of stoves or furnaces are connected with a singlechimney, the inner shell thereof may oftentimes be advantageouslydivided into two or more ducts by partitions 26, as represented in Figs.1 an d 2 In constructing a chimney in accordance with this invention thelower section of each shell would be firmly connected to a metal base,as 19, which is desirably of greater diameter than the outer shell anding, when inclosed or built in with concrete or masonry, a reliableanchor plate to retain the superposed structure in an erect position.The several tiers or sections of the shells are then successively placedone upon another until the chimney is completed and connected atintervals by the tie-bolts 24.

Oftentimes, and to make the structure more stable, the space within theinner tube may advantageously be filled to a certain height, say to thefirst side opening, by aballast of cement or other heavy material, as at21, and, likewise, the space intermediate the two shells, as at 22. Thisfilling serves also to protect the chimney at the place where it is mostsubjected to the effects of corrosion and should the metal,notwithstanding, be thus destroyed the filling will still remain intactand the efiiciency of the chimney remain unimpaired.

The operation of the invention will, it is thought, be understood fromthe foregoing, but it may be mentioned that the superiority of thepresent chimney, over others with which I am acquainted, is due to thefollowing referred to peculiar features which it embodies: The jacket ofair inclosing the inner shell, or

fine proper, keeps the latter at a high temperature and, in consequence,the same can be made of much smaller dimensions than ordinary forconveying an equal quantity of smoke or other combustion products; italso requires a less waste of heat with an accompanying saving of fuelto retain the heat in the flue to the temperature necessary to create aneffective draft; the

inner comparatively smooth surface of the smoke flue will collect butlittle soot and that will be released by the expansion and contractionof the metal due to the differences in temperature thereof occurringwhen the chimney is to be utilized, or vice versa; safety against fireby the employment of a double wall; the action of the heated air withinthe space between the shells, having a greater bouyancy than therelatively cooler air within the compartments of a house, furnishes areliable means for ventilation and which can be regulated by theregisters; the relatively light Weight of the chimney; the simplicity ofconstruction and the ease with which the various sections may beassembled by ordinary unskilled labor; and the safety against beingoverturned by earthquakes or wind storms.

Having described my invention, what I claim, is

1. A chimney formed of an inner metallic shell and an outer metallicshell with a space therebetween, said shells being each comprised of aplurality of interfitting sections, a transverse vertical partitionwithin each seetion of the inner shell, stay connections between saidshells comprising bolts and intervening pipes, resilient membersseverally secured to one of said shells and hearing' against the otherone, a branch intake conduit for said inner shell and extending throughthe outer shell, a vent conduit passing through said outer shell and communicating with the space between the shells, and means to regulate theopening of said vent conduit.

2. A chimney formed of an inner metallic shell and an outer metallicshell with a space therebetween, said shellsbeing each comprised of aplurality of inter-fitting sections, stay connections between saidshells comprising bolts and intervening pipes, resilient membersseverally secured to one of said shells and bearing against the otherone, a branch intake conduit for said inner shell and extending throughthe outer shell, a vent conduit passing through said outer shell andcommunicating with the space between the shells, and means to regulatethe opening of said Vent conduit.

3. A chimney formed of inter-fitting sections, said sections consistingof bars, and ends and sides, each of said bars extending from within ashort distance below the top or ges of the sides and ends to somedistance below the bottom edges thereof.

4. A chimney formed of interfitting sections, said sec tions comprisingangle bars, sides and ends secured to said angle bars, each of said barsextending from Within a short distance below the top edges of the sidesand ends to some distance below the bottom edge thereof, said last namedprotruding ends of the bars being formed with apertures, said sides andends adjacent the top edge thereof being provided with apertures.

in testimony whereof I aihx my signature in presence of two witnesses.

JOHN T. FLYNN.

Witnesses limmn PARNES. Hermon BARNES.

